Given that it seems every answer to this question is that it is "impossible to predict the outcome of a chemical reaction." Is chemistry just trial and error? Given how fundamental and revolutionary a simulator capable of predicting possible outcomes of a reaction would be, why has it not been done yet? Do you think it will ever happen?

$\begingroup$A useful computational method like CCSD(T) scales with $N^7$. Even if the Computers get more and more power, those methods will aways be extremely expensive$\endgroup$
– Fl.pf.Oct 28 '17 at 10:18